Question

An airplane's speed in still air is 240 km/h. (a) If the pilot wishes the resultant motion of the plane to be due north when a 60 km/h wind is blowing the plane due east, in what direction should the plane be headed? (b) What will then be the resultant speed of the airplane over the ground?

Answers

Steve
Draw a triangle. If the plane's speed due north is v, then

60^2 + v^2 = 240
direction θ such that sinθ = 60/240

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